How to use the `Default` theme on Android

[Ben S]

I'm working adding a GUI to a ray tracing application that I wrote and I'm using Qml for it. Right now I've been building it on a Linux desktop, but also testing it out on an Android tablet (Kindle Fire), and have plans to run it on an iPad too. On the desktop, it's using the Default style for UI theming: https://doc.qt.io/qt-5/qtquickcontrols2-default.html . I like it and have been building other custom controls off of it.

But when trying to run on Android it's been using the Material theme.

I tried explicitly specifying the Default theme in the qtquickcontrols2.conf file, as well as adding this in the main() function:

QQuickStyle::setStyle("Default");
QQuickStyle::setFallbackStyle("Default");

But still on Android it's giving me the Material theme. I was able to specify Fusion and well, got the Fusion theme on Android.

How can I get the Default UI theme to work on Android?

[Ben S]

I was able to get it to work. I did have to switch to Qt6. I also needed to add a qtquickcontrols2.conf file to my project (e.g. in the qml.qrc file), and add this in:

[Controls]
Style=Basic

[J.Hilk]

hi @Ben-S

IIRC the default theme for qml objects is only an option in Qt6 and onwards

[Ben S]

Ah, okay. I was using Qt5 on Desktop and Android. But I do have Qt6 installed. I'll give that a whirl and see what happens.

[Ben S]

I was able to get it to work. I did have to switch to Qt6. I also needed to add a qtquickcontrols2.conf file to my project (e.g. in the qml.qrc file), and add this in:

[Controls]
Style=Basic